https://hubzilla.org/page/info/admin_guide

Similar to Friendica, personal page style fediverse software.

I kind of liked hubzilla last I dabbled in one of those type apps.

ShredOS, lovely little USB boot system that you can use to wipe a drive like that. I would usually go with a 3 pass cleaning. Another option can be to use something like veracrypt to do an in place whole disk encryption that’ll make anything on it unreadable.